Air filter



Dec. 10, 1929. I P. plRcl-no 1,739,372

AIR FILTER Filed March 14, 1927 Inventor B] EM Attorngy Patented Dec.10, 1929 PATENT; OFFICE rasouann 21110310, or sourri BEND, INDIANA. .a'mFETEB Application filed. March 14, 1927. Serial No. 175,236.

This invention relates generally to hot air registers used in theheating systems of dwellings or-other building and has more particularreference to anair purifying device therefor, the prlmary object of theinvention residlike into ing in the PIOVlSlOIl of means constructed forready disposition within the register so as to filter the air passingtherethrough so as to prevent the passage of smoke, soot and the theparticular room. One of the most important objects of the invention isto provide a purifier of this character that is of relatively simpleconstruction, inexpensive of manufacture and one that may be easilydisposed within conventional hot air registers to cause the filtering ofthe air passing into and through the register.

'With the foregoing and other objects in view as the natureof theinvention will be bett understood, the same comprises the nov 1 form,combination andarran'gement of parts hereinafter more fully described,shown 1n the accompanying drawing and claimed.

a In the drawing wherein like reference characters indicatecorresponding parts in both of the views:

Figure l-is a'section .oia conventional hot air register havingcommunication with a furnace hot air pipe and arranged within which ismydmproved air purifying device, and

1gure2 is a. horizontal section through the register disclosing thepresent invention .in

I top plan.

Now havingparticular reference tothe drawing, A designates the floor ofabuilding equipped with a generally conventional hot air registerB havinga perforated metal lid C and being fla ed at its lower open side forreceiving the anged end of the usual hot air conveying pipe Dthat'extends to the furnace or other air heating plant, not disclosed.

' y invention per se consists of a conical shaped metallic container 5formed throughout its. entire area with air inlet openings 6 and havinga bottom wall material, or if desired said bottom wall may be of thesame material as forming said container. The diameter of this container5 is such that the same will partially enter the hot air pipe D and restupon the upper end of -v1ded a circular lid 9 screening having a wirerim 10. For the 7 of forarninous the pipe as disclosed in Figure l forentirely closmgthe same to the register B other than through saidcontainer. his container 5 is provided for the purposeiof holding anon-corrosive fire resisting 55 filter medium 8 such as metal, wool, orthe like. For maintaining this wool in a compact mass within thecontainer there is propreferably of wire purpose of securing this lidwithin the con tainer said container is formed at its 11 per edge at aplurality of spaced points with cut over lugs 11 beneath which isextended a length of wire 12 which wire will be in posi- 55 tionwithinthe container 5 at points intermediate said fingers 11. The wire rim 10of the screen lid 9 is also formed at a pluralit of spaced points withspring fingers 13, which when bent overthe length of wire 12 carried bythe container 5 intermediate the fingers 11 of said container willrigidly secure the wire mesh lid in position centrally within saidcontainer for preventing the loosening of the mass of filter material 8therein.

Obviously the hot air passing upwardly 7 through the pipe' D must passthrough the filter medium 8 before entering the register B. Smoke,'sootrand other foreign matter will be collected within this material so that9 the air finall assin throu h the re 'ster will befhighlg gurifie d. Qg1 Even though I'have herein shown and described this particularpurifying device as being of circular configuration for dispositionwithin a circular hot air register and a circular hot air conveying pipeit is nevertheless to be understood that other changes may be made inthe size and design of the same'in accordancewith the design and size ofconventional hot air-registers andtheir hot air communicating pipes.-

Having thus described the invention, What I claim is A hot air filtercomprising a frustoconical perforated body, a sheet of screen materialacross the smaller end of the body, a wire forming a square figurehaving its corners secured to the edge of the larger end of the f bodyso that the sides extend in chords thereacross, a foraminous closure ofcircular formation mounted in the confines of the wire and securedthereto and a mass of filtering material in the body between the sheetand the closure.

In testimony whereof I aflix my signature.

PASQUALE PIRCHIO.

